Does luxury vinyl flooring need a moisture barrier?

Author: Camron Yundt  |  Last update: Monday, June 1, 2026

Luxury vinyl plank manufacturers mention only vapor barrier in their installations. They recommend this due to not allowing (concrete subfloor) getting moisture or alkalinity to your flooring choice. This will eliminate any potential for claims or damages to the manufacturers flooring.

Do you need a moisture barrier under luxury vinyl plank flooring?

Typically, moisture barriers are needed when vinyl flooring is installed on top of a concrete subfloor or crawl space. Please refer to the manufacturer guidelines, installation instructions, and warranty information for more details.

Can mold grow under LVP flooring?

Yes, mold can grow under vinyl flooring if moisture becomes trapped underneath the flooring material. Vinyl flooring is not a breathable material, which means that moisture cannot escape through the flooring.

Can moisture get under vinyl plank flooring?

The vinyl planks may be waterproof but the moisture trapped underneath can cause mold & mildew. It really comes down to how big a job do you want? Trapped underneath the flooring the mold won't be ``too'' bad but it probably will be there and some will get out.

Can LVP go directly on concrete?

Yes, LVT and LVP can be installed on concrete surfaces using methods such as click-lock, glue-down, or loose lay.

Floor Moisture Barrier - When Do I Need It?

Should you put underlayment under vinyl plank flooring on concrete?

Moisture is always moving within the concrete, and the material can secrete from it over time. This may result in mold that can be particularly damaging to your home. If installing over concrete, use a underlayment that has a moisture barrier built in.

Does LifeProof LVP need a vapor barrier?

What About a Vapor Barrier? LifeProof installation instructions mention that a vapor barrier isn't required.

What destroys vinyl plank flooring?

Enemies of Vinyl Flooring
  • Dirt and Grit: Acting like sandpaper, dirt and grit particles can scratch the wear layer of the vinyl, especially at entryways and high-traffic areas. ...
  • Sharp Objects: Dropping sharp objects like knives or tools can puncture or gouge vinyl.

Does humidity affect luxury vinyl plank flooring?

Luxury vinyl plank flooring is manufactured to withstand humidity, moisture, dampness, and spills, with excellent results and lifespans of over 20 years.

Is waterproofing required under vinyl flooring?

Moisture build up beneath vinyls where negative pressures result in membrane failure and adhesive failure – One of the reasons that we are required to waterproof beneath vinyl is the presence and build-up of condensation beneath the vinyl.

Should you put plywood under LVP?

Plywood and OSB provides a nice and level base for LVP and LVT floors but doesn't offer warmth or cushioning. OSB offers better durability than plywood.

Will a dehumidifier dry under vinyl plank flooring?

To dry out vinyl surfaces, you can use fans, a heater, towels, or a mop. If the water gets under the flooring coming from an area below the floors (like a pipe leak), then you need to fix that first. Then you should follow up with a shop vac and/or dehumidifier to eliminate excess moisture.

What is the black stuff under the vinyl floor?

If you see black stuff under your vinyl flooring, it's probably mold. There is a chance it could just be dirt, dried-out adhesive, or slight water damage, but some of those are causes for mold growth, so you should remove it immediately anyway. In some older homes, it could be black mastic asbestos.

What is the difference between a vapor barrier and a moisture barrier?

Both are designed to keep moisture out of your home and can be made from various materials. But there are a few key differences, the most apparent being that moisture barriers are better at keeping out liquids, and vapor barriers are better at keeping out water in its gaseous state.

Can you install LVT without underlayment?

And, as you can imagine, gluing the luxury vinyl tiles or planks to a soft underlay material would result in a wobbly, unstable surface, not to mention a lot of mess – not really what you want for your new LVT floor! All this, means there's simply no underlay required at all.

What voids the warranty on vinyl plank flooring?

Accidents, abuse or misuse; • Extreme heat or cold; • Scratching, impact or cutting; • Improper workmanship or installation not in accordance with Dezign North America installation instructions; • Improper maintenance; • Improper fabrication; • Freight damage; • Damages by acts of God; • Planks coming apart at the ...

Do you need a vapor barrier under luxury vinyl plank?

What You Need For Your Flooring Application. We recommend for you to read the flooring installation instructions for proper installation. 95% of the time, they will recommend a 6-mil vapor barrier to be installed underneath the flooring.

Can you put rugs on luxury vinyl plank flooring?

Material Matters: Opt for natural fiber rugs like wool, cotton, or polypropylene. These materials are less likely to react with the vinyl and cause damage. Avoid Rubber Backing: Rugs with rubber or latex backing can cause discoloration on vinyl flooring due to a chemical reaction.

Can I use Swiffer wet pads on vinyl plank flooring?

If your flooring is waterproof, you can use a wet Swiffer safely, and can get a deeper clean than you'll get with a dry mop. Make sure that you use pads that feature a neutral household cleanser, rather than any harsh chemicals that could damage the flooring.

Can you put a refrigerator on vinyl plank flooring?

Since most furniture will not go under just one plank, it is perfectly safe for bulky furniture and refrigerators to go on vinyl plank flooring. Vinyl plank flooring will not be damaged or cracked by home appliances' weight due to its strong durability.

What is the life expectancy of vinyl plank flooring?

Generally speaking, vinyl sheet flooring will last anywhere from 10 to 20 years, while vinyl plank and tile flooring will last 15 to 20 years. The thickness of its wear layer vastly impacts vinyl flooring's lifespan, so pay attention to this detail when purchasing your flooring.

What happens if you don't put a moisture barrier under vinyl flooring?

When moisture penetrates your flooring, it can cause mold, mildew, and the potential for water damage. A moisture barrier helps control the water vapor's movement to help protect your floors. Therefore, if you're installing floors in an area that sees moisture, even a little, a vapor barrier is needed.

What is the best underlayment for luxury vinyl planks?

What is the Best Underlayment for Vinyl Plank Flooring? High-density foam is one of the most preferred choices for vinyl plank flooring. It is useful in avoiding dents on the vinyl floor surface and preventing the degrading of the spongy layer. Another choice is cork because it is also an anti-microbial material.

Can mold grow under vinyl plank flooring on concrete?

Sure, vinyl floors are moisture resistant. However, mold can still grow along the edges of the planks or where the floor meets the wall. Mildew can also occur beneath the vinyl flooring during installation if there are liquids on the concrete.

Previous article
Is it better to grout or caulk around a toilet?
Next article
Is cooking chicken in an air fryer safe?